Deep hole drilling device

Abstract

The utility model relates to a drilling and reaming integrated deep hole drill which comprises a drilling and reaming integrated deep hole drill body, a two-stage cutter bar and a cutter holder. The drilling and reaming integrated deep hole drill main body comprises a centering drill (4), a blade (7) and a cutter body (10); according to the utility model, deep holes are drilled and expanded by adopting a fusion mode that the centering drill and the four polygonal blades are relatively staggered, and the nodular cast iron with excellent anti-seismic property is integrally molded and cast into the cutter holder. The problem that in the deep hole and large hole diameter machining process of a metal workpiece, a large-size drill bit is relied on, vibration is too large, tolerance is too poor, and parts are scrapped is solved. According to the two-stage cutter bar, the precision of a metal piece after deep hole machining is guaranteed, the two-stage cutter bar is creatively designed in the machining process of metal pieces with different deep holes, and the problem that a cutter and the cutter bar are repeatedly disassembled and assembled is solved. The deep hole drilling device has the advantages of being high in stability, easy to operate and good in shock resistance. The processing range is wide, and the applicability is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, specifically relates to a deep hole drilling device for rough machining of deep hole of metal workpiece. BACKGROUND

[0002] At present, the machining method for thin-walled aluminum cylinder parts adopts turning to finished product size for single piece and small batch processing, but under the action of cutting force, clamping force, internal stress and other factors, deformation is easy to occur, the requirement of drawing cannot be met, and finally the workpiece is scrapped and cannot be used. INVENTION CONTENTS

[0003] The utility model provides a deep hole drilling device, and the technical problem to be solved is that the problem of part scrapping caused by excessive tolerance due to excessive vibration in the deep hole machining process of metal workpiece is solved.

[0004] In order to solve the above technical problem, the utility model provides a deep hole drilling device, characterized by comprising: a drilling and expanding integrated deep hole drilling main body and a tool bar connected with the drilling and expanding integrated deep hole drilling main body; the drilling and expanding integrated deep hole drilling main body comprises a centering drill (4), a blade (7) and a tool body (10); four blades (7) are fixed symmetrically on both sides of the tool body (10), and the two sides of the blade (7) are staggered at 180 degrees; the centering drill (4) is fixed at the center position of the front end of the tool body (10).

[0005] Further, a plurality of liquid discharge holes (5) are arranged along the chip removal groove of the tool body (10), the centering drill (4) and the top end of the tool body.

[0006] Further, the front end of the tool bar is provided with a clamping block (13) for being inserted into the clamping groove (11) at the tail end of the tool body (10).

[0007] Further, the tool bar is connected together by a plurality of tool bar bodies, the tool bar body at the most front end is provided with a clamping block, the tail end of each tool bar body is provided with a fixing groove (16) capable of being inserted into the inner cavity of the next tool bar body and fixed to extend the tool bar.

[0008] Further, the blade (7) is a polygonal blade.

[0009] Further, the extension length and angle of the centering drill (4) are adjustable, and the centering drill (4) comprises a 120° centering drill head and a 180° centering drill head, which are respectively used for front centering and rear centering hole.

[0010] Further, the chip removal groove of the tool body (10) is designed along the spiral direction of the centering drill (4).

[0011] Further, a special tool holder is further included for clamping the tail end of the tool bar.

[0012] Further, the special tool holder comprises a top wire (80), a tool holder locking bolt (81) and a tool holder body (82); the top wire (80) is used for supporting the slotted side of the upper part of the tool holder body (82) to insert the tool bar, and the tool bar is clamped through the tool holder locking bolt (81).

[0013] Further, the tool holder body (82) is integrally formed by cast iron.

[0014] Beneficial effects: the utility model discloses a centering drill and four polygonal inserts relatively staggered and fused to drill and expand deep holes, and a tool holder integrally formed by excellent shock resistance cast iron. It solves the problem of excessive tolerance and part scrap due to excessive vibration of large size drill bit during deep hole and large aperture machining of metal workpieces. It ensures the precision of deep hole machining of metal parts and creatively designs the two-stage tool bar to solve the problem of repeated disassembly and installation of tools and tool bars. The deep hole drilling device has the advantages of high stability, simple operation and good shock resistance. It has a wide machining range and strong applicability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Drill and expand integrated deep hole drill schematic diagram

[0016] Figure 2 Two-stage tool bar schematic diagram

[0017] Figure 3 Clamp schematic diagram. DETAILED DESCRIPTION

[0018] To make the purpose, content and advantages of the utility model more clear, the specific embodiment of the utility model is described in further detail below.

[0019] The utility model discloses a deep hole drilling device, including drill and expand integrated deep hole drill main part, two-stage tool bar, tool holder,

[0020] Drill and expand integrated deep hole drill main part: including centering drill (4), liquid discharge hole (5), insert support (6), insert (7), insert locking bolt (8), locking bolt (9), tool body (10), clamping groove (11), sealing groove (12);

[0021] The blade holder (6) is fixed to the front of the cutter body by locking bolts (9), the blade (7) is fixed on the blade holder (6) by blade locking bolts (8), and the four blades (7) are fixed on both sides of the cutter body (10) by locking bolts (9) at an angle of 180°; the centering drill (4) is fixed at the center of the front end of the cutter body and is fixed on the cutter body (7) by locking bolts (9); a plurality of liquid discharge holes (5) are provided along the chip removal groove of the cutter body, the centering drill and the top end of the cutter body; the chip removal groove of the cutter body (10) is designed in the spiral direction of the centering drill (4); and the end of the cutter body (10) is provided with a sealing groove (12).

[0022] The cutter bar is composed of a clamping block (13), a fixing bolt (14), a two-stage cutter bar body (15) and a fixing groove (16).

[0023] The cutter bar clamping block (13) is inserted into the tail end clamping groove (11) of the cutter body (10), the end sealing groove (12) of the cutter body (10) is inserted into the inner cavity of the first-stage cutter bar body (15), and the cutter body (10) is fixed by the fixing bolt (14). When the cutter bar needs to be extended, the tail end fixing groove (16) of the first-stage cutter bar body (15) is inserted into the inner cavity of the second-stage cutter bar body (15), and the first-stage cutter bar body (15) is fixed by the fixing bolt (14).

[0024] The special cutter holder is composed of a jack screw (80), a cutter holder locking bolt (81), a cutter holder body (82) and a cutter holder body locking bolt (83).

[0025] The jack screw (80) is used to open the special cutter holder slot on one side, and is inserted into the two-stage cutter bar body (15). Then the jack screw (80) is loosened, the cutter holder locking bolt (81) is tightened, and the cutter bar is clamped.

[0026] The axis of the cutter bar coincides with that of the cutter holder, and the cutter holder is installed at the front end of the slide plate of the machine tool.

[0027] The blade (7) is a polygonal blade.

[0028] In use, the blade holder (6) is fixed to the front part of the blade body by the locking bolt (9), the blade (7) is fixed on the blade holder (6) by the blade locking bolt (8), and the four blades (7) are fixed on the two sides of the blade body (10) by the locking bolt (9) at an angle of 180°, and the two blades (7) on one side are distributed staggered with respect to the two blades (7) on the other side after being rotated by 180°, so that the position that cannot be turned by the blade on one side can be turned by the blade on the other side, thereby realizing large-diameter drilling, and the multi-blade design can prolong the service life of the whole tool, the cutting force of the two sides can be more stable with respect to the blade body, the selected polygonal tool has strong cutting resistance, the annular V-shaped groove formed by cutting can ensure that the blade tip is always in the annular V-shaped groove, the stability of the blade is increased, and the chip removal effect is better; the centering drill (4) is fixed on the center position of the front end of the blade body and is fixed on the blade body (7) by the locking bolt (9), according to the machining requirement of the workpiece, the overhanging length of the centering drill (4) can be adjusted and different angle centering drills (4) can be replaced by adjusting the locking bolt (9), the design can ensure that the tool is guided by the centering drill (4) during drilling, thereby enhancing the overall stability of the tool and the machining precision, the centering drill (4) is divided into 120° centering drill and 180° centering drill according to the machining process, and is respectively used for front centering and rear centering hole; a plurality of liquid discharge holes (5) are formed in the blade body chip removal groove, the centering drill and the top end of the blade body, so that the cooling, lubrication and flushing of the machining position and the tool can be accelerated; the chip removal groove is designed along the spiral direction of the centering drill (4), which can guide and remove the long spiral chips generated by the centering drill.

[0029] Then the tool bar clamping block (13) is inserted into the tail end clamping groove (11) of the blade body (10), the end sealing groove (12) of the blade body (10) is inserted into the inner cavity of the first tool bar body (15), and the fixation of the blade body (10) is completed by the fixing bolt (14). When the tool bar needs to be extended, the tail end fixing groove (16) of the first tool bar body (15) is inserted into the inner cavity of the second tool bar body (15), and the fixation of the first tool bar body (15) is completed by the fixing bolt (14).

[0030] Then the special tool holder slot is opened by the jack screw (80), the two-stage tool bar body (15) is inserted, the jack screw (80) is loosened, the tool holder clamping bolt (81) is tightened to clamp the tool bar, and the tool holder body locking bolt (83) is locked in the front end of the slide plate of the machine tool. After the machining workpiece is centered, machining is started.

[0031] The preferred embodiments of the utility model are described above, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and deformations can be made without departing from the technical principles of the utility model, and these improvements and deformations should also be regarded as the protection scope of the utility model.

Claims

1. A deep hole drilling apparatus, characterized by, The application relates to a drill-expanding integrated deep hole drill body and a tool bar connected with the drill-expanding integrated deep hole drill body. The drill-expanding integrated deep hole drill body comprises a centering drill (4), a blade (7) and a tool body (10); four blades (7) are symmetrically fixed on both sides of the tool body (10), and the blades (7) on both sides are staggered at 180 degrees; and the centering drill (4) is fixed at the center position of the front end of the tool body (10).

2. The deep hole drilling apparatus of claim 1, wherein: A plurality of liquid discharge holes (5) are arranged along the chip removal groove of the tool body (10), the centering drill (4) and the top end of the tool body.

3. The deep hole drilling apparatus of claim 1, wherein: The front end of the tool bar is provided with a clamping block (13) for being inserted into a clamping groove (11) at the tail end of the tool body (10).

4. A deep hole drilling apparatus according to claim 3, wherein: The tool bar is connected by a plurality of tool bar bodies, the clamping block is arranged on the tool bar body at the front end, a fixing groove (16) is arranged at the tail end of each tool bar body, the fixing groove (16) can be inserted into the inner cavity of the tool bar body at the next stage and fixed to extend the tool bar.

5. The deep hole drilling apparatus of claim 3, wherein: The blade (7) is a polygonal blade.

6. The deep hole drilling apparatus of claim 1, wherein: The extension length and angle of the centering drill (4) are adjustable, and the centering drill (4) comprises a 120-degree centering drill head and a 180-degree centering drill head, which are respectively used for front centering and rear hole centering.

7. The deep hole drilling apparatus of claim 1, wherein: The chip removal groove of the tool body (10) is designed along the spiral direction of the centering drill (4).

8. A deep hole drilling apparatus according to any one of claims 1 to 7, wherein: The application further relates to a special tool clamp for clamping the tail end of the tool bar.

9. A deep hole drilling apparatus according to claim 8, wherein: The special tool clamp comprises a jackscrew (80), a clamp locking bolt (81) and a clamp body (82); the jackscrew (80) is used for supporting the slotted side of the upper part of the clamp body (82) to insert the tool bar and clamping the tool bar through the clamp locking bolt (81).

10. A deep hole drilling apparatus according to claim 9, wherein: The clamp body (82) is integrally formed by nodular cast iron.

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